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MailChimp Forms by MailMunch <= 3.2.1 — Cross-Site Request Forgery

CVE-2024-31378Published · Updated

Action summary

Affected: ≤3.2.1Update to 3.2.2 or newer

All remediation steps
Watch plugin
Severity
Medium4.3
CVSS
4.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:R User interaction
Required
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-352 CSRF
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Mailmunch Forms for Mailchimp mailchimp-forms-by-mailmunch

  1. Affected≤ 3.2.1
  2. Patched in3.2.2

Update to 3.2.2 or newer.

You are affected if you run ≤ 3.2.1. Version 3.2.2 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Mailmunch Forms for Mailchimp.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 3.2.2, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Mailmunch Forms for Mailchimp to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Majed Refaea.

The MailChimp Forms by MailMunch plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.2.1. This is due to missing or incorrect nonce validation on the integrate case. This makes it possible for unauthenticated attackers to update the plugin's access token via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Mailmunch Forms for Mailchimp

All 6
More vulnerabilities in Mailmunch Forms for Mailchimp
SeverityVulnerabilityCVEPublished
High8.1Missing Authorization to Authenticated (Subscriber+) MailMunch Integration Takeover via 'sign_in' AJAX Action
≤3.2.7Update to 3.2.8
CVE-2026-7520
Medium6.1Reflected Cross-Site Scripting
≤3.2.3Update to 3.2.4
CVE-2024-8726
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
≤3.2.2Update to 3.2.3
CVE-2024-29793
Medium5.4Cross-Site Request Forgery via Multiple AJAX actions
≤3.1.7Update to 3.1.8
CVE-2023-45748
Medium5.4Missing Authorization via multiple AJAX actions
≤3.1.4Update to 3.1.5
CVE-2023-40203

Same weakness (CSRF)

All CSRF
Other CSRF vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 4.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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